Device for stretching and tightening elevator-belts



(No Model.)

J. J. DOUGHTY.

DEVICE EOE STRETCHING AND TIGHTENING ELEVATOR BELTS.

Patented Oct. 2, 1888.

Il. g wllhrl gld lA www MEE guna/Wto@ (w/@m @mitm/eo @e o eea, @um

`Unrrieo @rares artnr @trionfo JOHN JEFFESON DOUGHTY, OF 'LAKE CITY, MINNESOTA.

DEVICE FOR STRETCHING AND TIGHTENlNG ELEVATOR-BELTS.

:SPECIFICATION forming part of Letters Patent o. 390,213, dated October 2,1888.

Application filed July l0, lSSS.

To @ZZ whom, it may concern:y

Be it known that I. JOHN JnnrEsoN DOUGH- 'rY, a citizen ofthe United States, residing at Lake City, in the county of Vabasha and State of h/linnesota, have invented certain new and useful Improvements in Devices for Stretching and Tightening either New or Old Elevator-Belts; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to improvements in that class of devices known as elevatorbelt stretchers and tighteners,7 and has for its object to hold, stretch into position, and tighten the free or meeting ends of the belt, thus taking up the slack which is the result of the continued use of the belt preparatory to lacing the meeting ends together.

To this end the invention consists in the novel construction and arrangement of the several parts, as will be hereinafter fully described, and pointed out in the claims.

n the accompanyingdrawings, which fully illustrate my invention, and to which rcfercnec is had, Figure l isa front elevation of ihc elevator-leg, showing a part of one side of the leg and the door removed to show the application of the stretching and tightening devices, and also elevatorbelt with attached buckets. Fig. 2 is a side sectional elevation of the same, and Fig.. 3 is a perspective View of the clevis.

Similar letters of reference indicate similar parts throughout all the figures.

Referring t-o the drawings, A represents a section of an elevator-leg, through which is passed and inclosed therein an elevator-belt, X, having secured in any suitable manner thereon elevatoi'bucketsy, which will be hereinafter more particularly referred to.

B is a metallic base or bearing plate, which is detachably secured to the forward and lower part of the elevatorleg section by means of a right angular integrally constructed flange, which passes over the upper part of the inclosed and lower portion of the legsection. The lower portion of this base or bearing plate B has another iiange, b', integrally constructed thereon and turned at a right angle to Bin Serial No. 279,503. (No model.)

the opposite direction to that of the upper flange, and has a perforation in the Center thereof, lh rough which is passed an adjustingscrew, It, the upper end of which bears in a depression upon the under side of an integrally-coustructed fiangewf, turned at right angles upon the lower end of a vertical adjust able T-shaped slide or tightener, Z), slotted as at b2, said flange being parallel with theliange b upon the lower part of the bearing-plate B. The upper part of this tightencr l) forms the fulcrum for a tightening and stretching lever, cl, which rests at an angle of about thirty degrecs thereon, and the lower or downwardly-i n clined end ofthis lever, which bears against the beltin the leg-section, is beveled off at aslight angle, as at d, so that it can get a goed purchase or grip upon the belt when the longer and outer end ofthe lever d is depressed, as more clearly seen in Fig. 2 of the drawings.. This tightener b is secured to the base or hearing plate B,and held in position relatively thereto by means of a screw-bolt, g, which is screwed into thc plate B and guide-piece g', by which it is guided (that is, the tightener or slotted slide) in its vertical adjustment upon the base or bearing plate B, to raise or lower the end of the lever d in conjunction with the :adj usting-screw lz., which passes through the flange b of the bearing-plate B and bears against the under side of the flangef/ of the tightener or slide previously described.

Secured to or near the center of lever d is one end of a chain, la, secured to the ilange'b by means of a hook, k, and by which the lever d is held in its operative position.

C isa projecting metal plate or fastening slotted upon its under side and detachabl y secured tothe forward and upper part of the elevator-leg section by means of supportingpins driven into the elevatonlcg section and 'flanges C C2, integrally constructed with the plate or fastening C.

To one of the ends of the plate C is pivot ally secured one end of a latclrbar, fi, having a'perforation in its opposite end,which regisn ters with a perforation in the under side of the other end of the plate or fastening C, through which is passed a thumb-screw, i, which locks and unlocks in place the latch-bar i', which supports and holds in place the ele- IOO vator-belt holding or tightening fork e, this fork having tines e' secured to one of its ends, which stick into or through the belt and tighten it to form ajunction with that end of the belt operated upon by the bevel end of the lever d, as clearly shown in Fig. 2 of the drawings. These tightening and stretching devlcesB C,with the fork and lever, being detachably secured to the elevatorleg section, can be readily removed when not in use and as readily applied when it becomes necessary to use them.

In Fig. 3 is shown a clevis, L, composed of the bar Z, having teeth Z thereon for engagement with the rear side of the bucket-belt. Frointhebarlextend parallel arms which terminate 1n hooks Z2 Z2, for engagement with the journals j on the plate j of lever d. In use the clevis is placed behind the belt at or near the point of severance,the teeth resting against the belt ready to enter the same when power is applied .to the lever through the screw h. The hooks, it will be perceived, extend over and engage with the journals, as stated above. When the belt is severed and the operation begins, as described below,the teeth are forced into the leather to prevent its slipping, while the hooks, in connection with the journals, serve to bind the belt tightly to the lever. The greater the power applied to the screw h the firmer will be the grasp of the clevis upon its end of the belt.

The operation of my device will be obvious when taken in connection with the accompaiiying drawings, but may herein be briefly rehearsed as follows: To stretch or tighten the belt, apply the upper metallic plate or fastening to the elevator-leg section, with the supporting-pins underneath for supporting and holding 1t in place; then unscrew the thnmbscrew 1n the latch bar and turn the bar back upon its pivot; insert the forked lever through the slot in theplate or fastening and elevatorleg section until the tines of the forked lever pierceand fasten themselves into or through the belt, care being taken to have the tines of the forked lever far enough up on the belt so that the lever will-draw upon the belt when it is put in its place in tlieplate or fastening,after which fasten or lock the latch-bar in its place. The lower tightener is applied to the elevatorleg section with the fnlcruni down to its lowest position, and the lever is then applied with its outer end elevated to an angle of' about thirty degrees. The connection is made with the belt by the tines of the forkedlever in the upper plate or fastening or with the clevis. The fastening being thus made, bring the lever down to a horizontal position and fasten it with the chain. Then turn up the tightener by means of the adj ustingscrew until the belt is tight enough or the lever stands at an angle of about thirty degrees. If the belt is not properly stretched or tightened at this point, drop the lever down to a horizontal position, fasten it with the chain, and turn up again by means of the adj usting-screw, and so on, until the belt is properly stretched or tightened.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,-

l. In a belt stretcher and tightener,the coinbination of the forked lever, a flanged plate secu red to the elevator-leg and provided with a slot and set-screw for securing the said lever thereto, and a lever for stretching the end of the belt toward the forked lever, substantially as described.

2. In a belt stretcher and tightener,the combination of the forked lever, a flanged plate secured to the elevator-leg and provided with a slot and set-screw for securing the said lever thereto, and a lever for stretching the end of the belt toward the forked lever and an adjustable tightener for said lever, and means for securing said lever in its adjusted position,

substantially as described.

3. In a belt stretcher and tightener, the coinbination of the forked lever, a flanged plate secured to the elevator-leg and provided with a slot and set-screw for securing the said lever thereto, a lever for stretching the end of the belt toward the forked lever, an adjustable tightener for said lever, ineans for securing said lever in its adjusted position, a clevis detachabl y secured to the stretching-lever for gripping the belt in stretching, a base-plate secured to the elevator-leg,an adj ustable tightener secured to the base-plate by means of a bolt, and an adj ustingscrew for adjusting the tightener, substantially as described, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN JEFFESON DOUGHTY.

Vitnesses:

L. J. FLETCHER, H. GILLETT.

IOO 

